Steam-heating system.



J. F. McELROY.

STEAM HEATING SYSTEM.

APPLICATION FILED JULY 2, 1912.

1! B 0 /A 8 8 8 9 Z I 7'0 Vapor i-qg for Trap 120};

70 Pressure Ha o Fig.3

Arranj'd for g f PRESS 1/125 i 2 To Press ur'e Tra u WITNESSES: INVENTOR z MM yW (214% y/zjgw BY 504.3%

ATTY

COLUMBIA PLANQGRAPH COHWASHNOTON, D. c.

Patented Oct. 19, 1915.

UNITED STATES PATENT QFFIC J JA ES 1E. 'lVLcELtEtQ-Y', 0F AL ANY NEW RK. .ASSI-GN R TD C0 I I E O HEATING-'SOMPANY, A' OBPOBA'ILI ND WES 'VJRGINIA.

' smart-HEATING SYSTEM.

speei ficationof Letters Patent.

Ratjented Oct. 19. 1915.

v App1tea tionrfiledHu1y-2, 19.12.. s e-ant. 7.07am.

.7 For .a detailed description of the present,

fonmloi my invention, reference may be had to the following-.spe ci'=fic.ati on and to the .accompanyingdrawing, which illustrates'my invention, vvherein- Figure 1 shows my apparatus diagrammatically'; Figs. *2 and Bfs'how the two different conditions of the reversing .sh'i'ftvalve. 7 V

My invention relates to a steam heating system, designed especially for car heating, which may be operated under higlhmressure or low-pressure conditions as may be desired according as it is placed under control of a vapor trap or .a pressure regulator, respectively.

It is now well known that a vapor regulator is one wherein the inlet valve between the source of steam supply and the radiator pipes is controlled by a thermostat subjected to the outflow from the radiator, the outlet end of theradiator pipe being usually open to the atmosphere, so that the pressure inthe radiator is low. It is equally well known that a pressure trap is one wherein an outlet valve of the radiator is controlled by a thermostat subjected to the outflow from the radiator. In the latter case the outlet valve will be closed a large part of the time thereby retaining the steam pressure in the radiator, which is consequently under a comparatively high pressure of steam. v

In my present arrangement I provide a valve by which the radiator maybe placed under the control of either device at will, the arrangement being such that the flow of steam through the radiator is reversed in direction in shifting from one condition to the other.

In the drawings the train-pipe or source handle a and the two conditions of this valve are shown in Figs. 2 and 3. The vapor conditions qarevsho-w n in {Fig.2 and the pres- .7

sure conditions in Fig. 3. iFrom valve A the steam flows through the radiator pipe B :to the vapor regulator or pressure trap according .to the position .of the valve. Asappears Fig. 2, the steam :entering valve A from supply pipe -8 will pass through the'valve to pipe 9 and thence through pipe :12 to the radiator B (the branch pipe L3 leading to the pressure trap I being normally closed at the trap as usual) vandafter passing through radiatorfireturns by pipe 11 to valve A and passes :therethrough to pipe :10 leading to the vapor regulator The vapor regulator Will control, in the usual manner, the flow oifientering-steam anthe' supply pipe -S. The system will then operate as a vagpoiyor lowpressune system. @n :the other hand, when valve A is turned as shown in Fig. 3, the flow of steam from supply pipe '8 "will pass through'the valve to -':the pipe 11 which was formerly the outflow pipe from the radiator B, but which now becomes the infl'ow pipe thereto. After passing through the radiator, the steam flows by pipes 12 and 13 to the pressure trap P (the pipe 9 being blanked at valve A) and the trap P will then, in the usual manner, control the outflow end of the radiator pipe, the inflow from pipe 8 being free from the control of the vapor regulator V. The system will thus become a pressure system instead of a vapor system. 1

What I claim as new and desire to secure by Letters Patent is:

1. The combination with a source of steam supply and a radiator, of a pipe connection between the steam supply and both terminals of the radiator, a thermostatic regulator controlling the pipe connection, a pressure trap in communication with one terminal of said radiator, and means in said pipe connection whereby the steam may be caused to flow through the radiator in one direction to the thermostat of the regulator, or through the radiator in the opposite direction to the trap, and excluded from the radiator.

2. The combination with a source of steamsupply, and a radiator, of a thermostatic vapor regulator interposed between the steam'supply and theradiator, means connecting the regulator with one terminal of the radiator, apressure trap connected with the other terminal of the radiator, and

means whereby steam may be selectively. ,caused to flow to the radiator in either dii.

rection, and the outflow of the radiator like; wise caused to'fiow either to the trap or to the thermostat of the regulator,accord1ng to the direction of inflow of the steam into},

the radiator,

3." The combination with a source of supply, and a radiator, of a thermostatic"- flow tothe radiator in either direction, and to cause the outflow of the radiator to flow 7 either to the trap or tothe thermostat. of

the regulator according to the direction of inflow of the steam into the radiator; i

4:." The combination with a radiator and a 'sourceof steam supply, of a pipe connection between-the steam supply and one terminal of the radiator, abranch connection between the pipe and the other terminal of the radia tor," a thermostatic vaporfregulator connected with said branch and interposed between I the'steam supply and the radiator, said re copies of this patent may be obtained for tulator being in communication with said branch connection, apressure trap also coninected with the .last mentionedterminal' of the radiator, and a valve provided with meanswhereby steam, may be selectively caused to'flow to the radiator in either direct on, and the outflow of the radiator likewise caused to flow either to the trap or to thethe'rmostatof the radiator, according to the direction ofinflow of the steam into'the radiator.

steam supply therefor, thermostatic vapor regulator interposed'between the steam sup;

I 7 I 5. In a steam'heatlng'sys'tem, arad1ator,.a

ply and the-radiator, apressure trap in 4 connection with the radiator, and means 3 wherebythe steam' is caused to flowxthrough a the radiator-in one direction and 'tofreturn to the regulator, 'or'; caused tofiowthrough ,1

the radiator in the'oppositedirection to the trap and to be excluded from theregulator; In witness whereof I have hereunto set my handbefore two "subscribing witnesses, this,

twenty-ninth'day of June, 1912. I i JAMESFLZM ELRQ Witnesses: "HER ERT A. GAULKINS,

CLARENCE PALMER.

fivecents each,eby addressingtlie Commissioner of Patents Washington, D. 0. W 

